grav_sim

N-body gravity simulation library with C and Python API

Project Homepage and documentations: https://alvinng4.github.io/grav_sim/

Target Audience:

• Physics students
• Anyone interested in N-body simulations

Features:

• Ten integrators including WHFast and IAS15
• Barnes-Hut algorithm with linear octree
• Particle-Mesh method for cosmological structure formation
• Multiple sample projects

5 steps to N-body simulation

A short course to teach beginners how to write fast and clean N-body gravity simulations code in Python.

Homepage: https://alvinng4.github.io/grav_sim/5_steps_to_n_body_simulation/

Contents

• Step 1: Initial setup
• Step 2: Gravity
• Step 3: Your first N-body program
• Step 4: Higher-order algorithms
• Step 5: Adaptive time-stepping
• Extra: Plotting and animation
• Conclusion and Final Project

Sample projects

Evolving the solar system for 1 million years

Asteroid belt animation

Formation of Kirkwood gaps

Galaxy collision

Cosmological structure formation

Feedback and Bugs

If you found any bugs or want to leave some feedback, please feel free to let me know by opening an issue or sending an email to alvinng324(at)gmail.com.